Actually there ia PC version of the demo out as well. I am downloading it right now.
As for Myst 3 & 4, If anybody were to ask, I would say that they had good graphics, some of the graphics in myst 4 were downright awesome.
As for the puzzles in 3 & 4, If you though those were Mind F***s... I pity you, I really do.
What made the puzzles in Riven so great was that in many cases they required you look for a bigger picture and to take hints and evidence from many subtle clues. In Myst 3 & 4 the puzzles were all very simple (even if they took a lot to solve, their premise was simple) and require very little deep reasoning.
As for all the awards that Myst 3 & 4 won, you are right about that, but I could never figure it out. Anyway, those are just my 2 cents worth as an avid Myst fan.
"Well, if I am not drunk, I am mad, but I trust I can behave like a gentleman in either
condition."... G. K. Chesterton
“questions are a burden to others; answers a prison for oneself”